基于三维激光扫描的锦屏地下实验室岩体变形破坏特征关键信息提取技术研究

发布时间：2019-03-17 18:09

【摘要】：针对施工期的中国锦屏地下实验室二期工程,利用三维激光扫描技术对各个实验室进行持续观测,得到开挖面原始点云数据,并通过一系列数据处理获取实验室轮廓变形、岩体结构及岩体破坏定量化表征信息。实践表明,利用CYCLONE软件处理原始点云数据,能够准确地获取实验室开挖后轮廓随时间的变化,精度满足工程要求,经现场围岩变形破坏特征证实数据处理结果符合实际规律;利用CYCLONE及基于结构面单位法向量的产状算法亦可准确快速地获取结构面产状,测量结果与传统方法结果相符。此外,利用CYCLONE、Geomagic Studio、3DMAX处理原始数据亦为统计实验室围岩破坏程度提供了简便高效的方法,获取的破坏区深度及体积与其他手段测量值基本一致。与点式监测技术相比,基于三维激光扫描的深埋硬岩隧洞监测与数据处理具备同时获取全场变形且快速、安全、高效的优势,对于研究深埋硬岩隧洞岩体力学行为是一种十分有效的技术手段。
[Abstract]:In view of the second phase project of Jinping underground laboratory in China during the construction period, three-dimensional laser scanning technology is used to continuously observe each laboratory, and the original point cloud data of the excavated surface are obtained, and the laboratory contour deformation is obtained through a series of data processing. Rock mass structure and quantitative characterization information of rock mass failure. The practice shows that using CYCLONE software to deal with the original point cloud data can accurately obtain the time-varying contour after excavation in the laboratory, and the accuracy meets the requirements of the project. The data processing results are confirmed by the deformation and failure characteristics of the surrounding rock in the field to accord with the actual law. CYCLONE and the yield algorithm based on the unit normal vector of the structural plane can also be used to obtain the shape of the structural surface accurately and quickly. The measured results are in agreement with the results of the traditional methods. In addition, the use of CYCLONE,Geomagic Studio,3DMAX to deal with the original data also provides a simple and efficient method for the statistical laboratory of the failure degree of surrounding rock, and the depth and volume of the failure zone obtained are basically consistent with the measured values by other means. Compared with the point monitoring technology, the monitoring and data processing of deep-buried hard rock tunnel based on three-dimensional laser scanning has the advantages of fast, safe and efficient, which can simultaneously obtain the full-field deformation. It is a very effective technique to study the mechanical behavior of rock mass in deep-buried hard rock tunnel.
【作者单位】：中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;雅砻江流域水电开发有限公司;
【基金】：国家自然科学基金重点项目(No.11232014,No.51309218) 十三五国家重点研发计划(No.2016YFC0600707)~~
【分类号】：TU45

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